He told the hearing the pornographic "Glam" folder was put onto the school system by Mr Adams just before he took his class to a harvest festival at the local church.

He said evidence also showed Mr Adams accessed a similar pornographic "Glam" file on his laptop computer later that night - and deleted all files from his memory stick.

DC Jones said: "When he handed in the memory stick to police the next day there appeared to be nothing on it - but forensic tools allowed us to see all the deleted files.

"Mr Adams is the only person who truly knows how the "Glam" folder appeared on the school server." When the school computers were examined by police they discovered 80 pornographic images of adult women.

EMBARRASSING: There were also pictures of Great Gatsby actress Isla Fisher on the incriminating memory stick [GETTY]

They also uncovered a Level One child abuse image - of a naked girl of approximately 15.

A video of a girl who appeared to be under 16 and partially clothed was also found in the recycle bin of Adams' laptop.

Mr Adams was found guilty of unacceptable professional conduct after introducing pornographic images onto the school curriculum network.

Steve Powell, chairing the panel, imposed a prohibition order banning Adams from the teaching register for five years.

After that he will be eligible to reapply to join but acceptance is not guaranteed.

Mr Powell said: "This was a particularly serious incident of unacceptable professional conduct.

"The child abuse image found is fundamentally incompatible with Mr Adams continuing to be a registered teacher."